science

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Across
  1. 4. takes oxygen from the atmosphere and releases carbon dioxide
  2. 5. fuels such as gasoline, oil, and coal contain large amounts of carbon
  3. 7. dead organisms are decomposed by organisms such as bacteria and fungi.
  4. 9. when nitrogen cycles through the environment
  5. 10. When water vapor cools and becomes a liquid again
Down
  1. 1. the movement of carbon from the atmosphere into living organisms, then into the Earth, and then back to the atmosphere again
  2. 2. When plants and algae remove carbon dioxide from the atmosphere to make glucose and release oxygen back into the atmosphere.
  3. 3. The water in the clouds eventually returns to the Earth by falling.
  4. 6. The movement of oxygen from the atmosphere into living organisms and back to the atmosphere.
  5. 8. When water leaves the Earth, and enters the atmosphere as a gas called water vapor